/Engine/Source/Developer/AssetTools/Public/AssetTypeActivationOpenedMethod.h
(jcotton) This enum has been extracted into a separate header as it would ideally live in IAssetTypeActions.h or AssetTypeActions_Base.h, however these files are included without module linking (IncludePathModuleNames) in several other modules which makes adding a UENUM() not possible without refactoring.
enum EAssetTypeActivationOpenedMethod { Edit, View, }